package com.ruoyi.web.controller.system;


import com.ruoyi.system.socket.WebSocketServer;
import org.springframework.stereotype.Component;

import javax.websocket.*;
import javax.websocket.server.ServerEndpoint;
import java.io.*;
import java.util.concurrent.CopyOnWriteArraySet;
/**
 * 即时通讯
 */
@Component
@ServerEndpoint("/webSocket")
public class MyWebScoketController {

    private static int onlineCount = 0;
    private static CopyOnWriteArraySet<MyWebScoketController> webSocketSet = new CopyOnWriteArraySet<MyWebScoketController>();
    private Session session;

    /**
     * 连接建立成功调用的方法
     * @param session  可选的参数。session为与某个客户端的连接会话，需要通过它来给客户端发送数据
     */
    @OnOpen
    public void onOpen(Session session){
        this.session = session;
        webSocketSet.add(this);     //加入set中
        addOnlineCount();           //在线数加1
        System.out.println("有新连接加入！当前在线人数为" + getOnlineCount());
    }
    /**
     * 连接关闭调用的方法
     */
    @OnClose
    public void onClose(){
        webSocketSet.remove(this);  //从set中删除
        subOnlineCount();           //在线数减1
        System.out.println("有一连接关闭！当前在线人数为" + getOnlineCount());
    }
    /**
     * 收到客户端消息后调用的方法
     * @param message 客户端发送过来的消息
     * @param session 可选的参数
     */
    @OnMessage
    public void onMessage(String message, Session session) {
        System.out.println("来自客户端的消息:" + message);
        //群发消息
        for(MyWebScoketController item: webSocketSet){
            try {
                item.sendMessage(message);
            } catch (IOException e) {
                e.printStackTrace();
                continue;
            }
        }
    }
    @OnError
    public void onError(Session session, Throwable error){
        System.out.println("发生错误");
        error.printStackTrace();
    }

    /**
     *
     * @param message
     * @throws IOException
     */
    public void sendMessage(String message) throws IOException{
        this.session.getBasicRemote().sendText(message);
    }
    /**
     * 群发自定义消息
     * */
    public static void sendInfo(String message) throws IOException {
        for (MyWebScoketController item : webSocketSet) {
            try {
                item.sendMessage(message);
            } catch (IOException e) {
                continue;
            }
        }
    }


    public static synchronized int getOnlineCount() {
        return onlineCount;
    }

    public static synchronized void addOnlineCount() {
        MyWebScoketController.onlineCount++;
    }

    public static synchronized void subOnlineCount() {
        MyWebScoketController.onlineCount--;
    }

}